氮的

The effects of the initial NH+4-N, DO and pH on the completely autotrophic nitrogen removal performance of the granular sludge were investigated in batch experiments.

采用间歇实验，考察了初始NH+4-N浓度、DO浓度和pH对颗粒污泥完全自营养脱氮的特性的影响。

It will provide scientific basis for applying fertilizer rationly during biogeochemistry cycles of C, N and global climatic change.

为农田生态系统碳、氮的生物地球化学循环及全球变化下农业生产中肥料的合理施用提供科学依据。

Oyster was hydrolysed with six kinds of commercial proteinases including pepsin, trypsin, bromelin, papain, 3942 neutral proteinase and Alcalase 2.4L. Three enzymes of better hydrolysis effect were chosen as the target enzymes, taking the α-amino nitrogen in the hydrolysates as the index. The hydrolysis conditions of the three enzymes were investigated by single factor experiment and orthogonal test.

选取胃蛋白酶、胰蛋白酶、菠萝蛋白酶、木瓜蛋白酶、3942中性蛋白酶、Alcalase碱性蛋白酶等对牡蛎进行水解，以水解液中氨基酸态氮的含量为指标，确定了3种水解效果较好的酶：Alcalase碱性蛋白酶、胰蛋白酶和菠萝蛋白酶。

The result showed that the amount of total phosphorus in the soil of farmland is the highest,while the wet grassland field with arbor shrub and grassland field and bulrush field is lower than that in farmland before rain.

结果表明，降雨前农田土壤总磷的含量最高，其次为湿生草本带，乔灌草带和挺水植物带则相对较低；土壤表层总氮的含量乔灌草带最高。

The comparison of fine root biomass and belowground C and N storage among the Korean pine and broad-leaved climax forest, three dark-conifer forests, a betula ermanii forest along the altitudinal gradient

因此，细根由于其生长迅速、周转率较快，而且可以在较深的土壤中分布，成为生态系统中土壤碳、氮的重要来源。

Methods Rad ioimmunoassay and colorimeter were applied to detect the levels of serum and tum or tissue ET-1 and NO in 40 elderly cases of lung cancer and serum samples from 30 normal individuals and 20 patients with benign lung diseases were taken as c ontrols.

方法应用比色法和放免法测定 40例老年肺癌患者血清和组织中的内皮素-1和一氧化氮的含量，并设 3 0例正常人和 2 0例肺良性病变患者为对照组。

Of or relating to or containing nitrogen.

含氮的或与之相关的。

Under different winter cover crop conditions, the ability of absorption of nutrients and growth of late rice were improved, so that the biomass accumulation of late rice of T1, T2, T3, T4 were higher than that of CK.

结果表明：不同冬季覆盖植物均能改善稻田土壤肥力状况，提高稻田土壤有机碳和全氮的含量，促进晚稻对养分的吸收和植株生长发育。

Cytosine A nitrogenous base found in DNA and RNA.

胞嘧啶：在 DNA 和 RNA 中存在的含氮的碱基。

A deliquescent salt Ca(NO32 that is soluble in water; sometimes used as a source of nitrogen in fertilizers.

一种水溶性的盐，有时用作肥料中氮的来源。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。